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ce29b371 MJ |
1 | // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2 | // | |
3 | // SPDX-License-Identifier: GPL-2.0-or-later | |
4 | ||
fdee2e6d | 5 | /* |
fdee2e6d | 6 | * Userspace RCU library - test program |
fdee2e6d MD |
7 | */ |
8 | ||
fdee2e6d MD |
9 | #include <stdio.h> |
10 | #include <pthread.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/types.h> | |
14 | #include <sys/wait.h> | |
15 | #include <unistd.h> | |
16 | #include <stdio.h> | |
94b343fd | 17 | #include <errno.h> |
fdee2e6d MD |
18 | |
19 | #include <urcu/arch.h> | |
01477510 | 20 | #include <urcu/assert.h> |
bd252a04 | 21 | #include <urcu/tls-compat.h> |
94df6318 | 22 | #include "thread-id.h" |
2650042a | 23 | #include "../common/debug-yield.h" |
65fcc7e9 | 24 | |
fdee2e6d MD |
25 | /* hardcoded number of CPUs */ |
26 | #define NR_CPUS 16384 | |
27 | ||
fdee2e6d MD |
28 | #ifndef DYNAMIC_LINK_TEST |
29 | #define _LGPL_SOURCE | |
fdee2e6d MD |
30 | #endif |
31 | #include <urcu-bp.h> | |
32 | ||
fdee2e6d MD |
33 | static unsigned long wdelay; |
34 | ||
bcc74df3 | 35 | static int *test_rcu_pointer; |
fdee2e6d MD |
36 | |
37 | static unsigned long duration; | |
38 | ||
39 | /* read-side C.S. duration, in loops */ | |
40 | static unsigned long rduration; | |
41 | ||
31b598e0 MD |
42 | /* write-side C.S. duration, in loops */ |
43 | static unsigned long wduration; | |
44 | ||
ab0aacbe | 45 | static inline void loop_sleep(unsigned long loops) |
fdee2e6d | 46 | { |
ab0aacbe | 47 | while (loops-- != 0) |
06f22bdb | 48 | caa_cpu_relax(); |
fdee2e6d MD |
49 | } |
50 | ||
51 | static int verbose_mode; | |
52 | ||
53 | #define printf_verbose(fmt, args...) \ | |
54 | do { \ | |
55 | if (verbose_mode) \ | |
56 | printf(fmt, args); \ | |
57 | } while (0) | |
58 | ||
59 | static unsigned int cpu_affinities[NR_CPUS]; | |
60 | static unsigned int next_aff = 0; | |
61 | static int use_affinity = 0; | |
62 | ||
63 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
64 | ||
65 | static void set_affinity(void) | |
66 | { | |
2388c075 | 67 | #ifdef HAVE_SCHED_SETAFFINITY |
fdee2e6d | 68 | cpu_set_t mask; |
95bc7fb9 MD |
69 | int cpu, ret; |
70 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
71 | |
72 | if (!use_affinity) | |
73 | return; | |
74 | ||
2388c075 | 75 | #ifdef HAVE_SCHED_SETAFFINITY |
fdee2e6d MD |
76 | ret = pthread_mutex_lock(&affinity_mutex); |
77 | if (ret) { | |
78 | perror("Error in pthread mutex lock"); | |
79 | exit(-1); | |
80 | } | |
81 | cpu = cpu_affinities[next_aff++]; | |
82 | ret = pthread_mutex_unlock(&affinity_mutex); | |
83 | if (ret) { | |
84 | perror("Error in pthread mutex unlock"); | |
85 | exit(-1); | |
86 | } | |
d8540fc5 | 87 | |
fdee2e6d MD |
88 | CPU_ZERO(&mask); |
89 | CPU_SET(cpu, &mask); | |
90 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 91 | #endif /* HAVE_SCHED_SETAFFINITY */ |
fdee2e6d MD |
92 | } |
93 | ||
bd252a04 MD |
94 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
95 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
fdee2e6d MD |
96 | |
97 | static unsigned int nr_readers; | |
98 | static unsigned int nr_writers; | |
99 | ||
100 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
101 | ||
61c3fb60 | 102 | static |
fdee2e6d MD |
103 | void *thr_reader(void *_count) |
104 | { | |
105 | unsigned long long *count = _count; | |
bcc74df3 | 106 | int *local_ptr; |
fdee2e6d | 107 | |
94df6318 MD |
108 | printf_verbose("thread_begin %s, tid %lu\n", |
109 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
110 | |
111 | set_affinity(); | |
112 | ||
113 | rcu_register_thread(); | |
01477510 | 114 | urcu_posix_assert(!rcu_read_ongoing()); |
fdee2e6d | 115 | |
9e4e7ad1 | 116 | wait_until_go(); |
fdee2e6d MD |
117 | |
118 | for (;;) { | |
119 | rcu_read_lock(); | |
01477510 | 120 | urcu_posix_assert(rcu_read_ongoing()); |
fdee2e6d | 121 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 122 | rcu_debug_yield_read(); |
fdee2e6d | 123 | if (local_ptr) |
01477510 | 124 | urcu_posix_assert(*local_ptr == 8); |
a0b7f7ea | 125 | if (caa_unlikely(rduration)) |
fdee2e6d MD |
126 | loop_sleep(rduration); |
127 | rcu_read_unlock(); | |
bd252a04 | 128 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 129 | if (caa_unlikely(!test_duration_read())) |
fdee2e6d MD |
130 | break; |
131 | } | |
132 | ||
133 | rcu_unregister_thread(); | |
134 | ||
bd252a04 | 135 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
136 | printf_verbose("thread_end %s, tid %lu\n", |
137 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
138 | return ((void*)1); |
139 | ||
140 | } | |
141 | ||
61c3fb60 | 142 | static |
fdee2e6d MD |
143 | void *thr_writer(void *_count) |
144 | { | |
145 | unsigned long long *count = _count; | |
bcc74df3 | 146 | int *new, *old; |
fdee2e6d | 147 | |
94df6318 MD |
148 | printf_verbose("thread_begin %s, tid %lu\n", |
149 | "writer", urcu_get_thread_id()); | |
fdee2e6d MD |
150 | |
151 | set_affinity(); | |
152 | ||
9e4e7ad1 | 153 | wait_until_go(); |
fdee2e6d MD |
154 | |
155 | for (;;) { | |
bcc74df3 MD |
156 | new = malloc(sizeof(int)); |
157 | *new = 8; | |
d2835e6f | 158 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 159 | if (caa_unlikely(wduration)) |
31b598e0 | 160 | loop_sleep(wduration); |
d2835e6f | 161 | synchronize_rcu(); |
fdee2e6d | 162 | if (old) |
bcc74df3 MD |
163 | *old = 0; |
164 | free(old); | |
bd252a04 | 165 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 166 | if (caa_unlikely(!test_duration_write())) |
fdee2e6d | 167 | break; |
a0b7f7ea | 168 | if (caa_unlikely(wdelay)) |
fdee2e6d MD |
169 | loop_sleep(wdelay); |
170 | } | |
171 | ||
94df6318 MD |
172 | printf_verbose("thread_end %s, tid %lu\n", |
173 | "writer", urcu_get_thread_id()); | |
bd252a04 | 174 | *count = URCU_TLS(nr_writes); |
fdee2e6d MD |
175 | return ((void*)2); |
176 | } | |
177 | ||
61c3fb60 | 178 | static |
70469b43 | 179 | void show_usage(char **argv) |
fdee2e6d | 180 | { |
06637138 MD |
181 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
182 | argv[0]); | |
183 | printf("OPTIONS:\n"); | |
06637138 | 184 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
185 | printf(" [-d delay] (writer period (us))\n"); |
186 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
187 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
188 | printf(" [-v] (verbose output)\n"); | |
189 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
fdee2e6d MD |
190 | printf("\n"); |
191 | } | |
192 | ||
193 | int main(int argc, char **argv) | |
194 | { | |
195 | int err; | |
196 | pthread_t *tid_reader, *tid_writer; | |
197 | void *tret; | |
198 | unsigned long long *count_reader, *count_writer; | |
199 | unsigned long long tot_reads = 0, tot_writes = 0; | |
200 | int i, a; | |
83e334d0 | 201 | unsigned int i_thr; |
fdee2e6d MD |
202 | |
203 | if (argc < 4) { | |
70469b43 | 204 | show_usage(argv); |
fdee2e6d MD |
205 | return -1; |
206 | } | |
207 | ||
208 | err = sscanf(argv[1], "%u", &nr_readers); | |
209 | if (err != 1) { | |
70469b43 | 210 | show_usage(argv); |
fdee2e6d MD |
211 | return -1; |
212 | } | |
213 | ||
214 | err = sscanf(argv[2], "%u", &nr_writers); | |
215 | if (err != 1) { | |
70469b43 | 216 | show_usage(argv); |
fdee2e6d MD |
217 | return -1; |
218 | } | |
83e334d0 | 219 | |
fdee2e6d MD |
220 | err = sscanf(argv[3], "%lu", &duration); |
221 | if (err != 1) { | |
70469b43 | 222 | show_usage(argv); |
fdee2e6d MD |
223 | return -1; |
224 | } | |
225 | ||
226 | for (i = 4; i < argc; i++) { | |
227 | if (argv[i][0] != '-') | |
228 | continue; | |
229 | switch (argv[i][1]) { | |
fdee2e6d | 230 | case 'r': |
2650042a | 231 | rcu_debug_yield_enable(RCU_YIELD_READ); |
fdee2e6d MD |
232 | break; |
233 | case 'w': | |
2650042a | 234 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
fdee2e6d | 235 | break; |
fdee2e6d MD |
236 | case 'a': |
237 | if (argc < i + 2) { | |
70469b43 | 238 | show_usage(argv); |
fdee2e6d MD |
239 | return -1; |
240 | } | |
241 | a = atoi(argv[++i]); | |
242 | cpu_affinities[next_aff++] = a; | |
243 | use_affinity = 1; | |
244 | printf_verbose("Adding CPU %d affinity\n", a); | |
245 | break; | |
246 | case 'c': | |
247 | if (argc < i + 2) { | |
70469b43 | 248 | show_usage(argv); |
fdee2e6d MD |
249 | return -1; |
250 | } | |
251 | rduration = atol(argv[++i]); | |
252 | break; | |
253 | case 'd': | |
254 | if (argc < i + 2) { | |
70469b43 | 255 | show_usage(argv); |
fdee2e6d MD |
256 | return -1; |
257 | } | |
258 | wdelay = atol(argv[++i]); | |
259 | break; | |
31b598e0 MD |
260 | case 'e': |
261 | if (argc < i + 2) { | |
70469b43 | 262 | show_usage(argv); |
31b598e0 MD |
263 | return -1; |
264 | } | |
265 | wduration = atol(argv[++i]); | |
266 | break; | |
fdee2e6d MD |
267 | case 'v': |
268 | verbose_mode = 1; | |
269 | break; | |
270 | } | |
271 | } | |
272 | ||
273 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
274 | duration, nr_readers, nr_writers); | |
275 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
276 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
277 | printf_verbose("thread %-6s, tid %lu\n", |
278 | "main", urcu_get_thread_id()); | |
fdee2e6d | 279 | |
9aa14175 MD |
280 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
281 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
282 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
283 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
fdee2e6d MD |
284 | |
285 | next_aff = 0; | |
286 | ||
83e334d0 MJ |
287 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
288 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
289 | &count_reader[i_thr]); | |
fdee2e6d MD |
290 | if (err != 0) |
291 | exit(1); | |
292 | } | |
83e334d0 MJ |
293 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
294 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
295 | &count_writer[i_thr]); | |
fdee2e6d MD |
296 | if (err != 0) |
297 | exit(1); | |
298 | } | |
299 | ||
9e4e7ad1 | 300 | test_for(duration); |
fdee2e6d | 301 | |
83e334d0 MJ |
302 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
303 | err = pthread_join(tid_reader[i_thr], &tret); | |
fdee2e6d MD |
304 | if (err != 0) |
305 | exit(1); | |
83e334d0 | 306 | tot_reads += count_reader[i_thr]; |
fdee2e6d | 307 | } |
83e334d0 MJ |
308 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
309 | err = pthread_join(tid_writer[i_thr], &tret); | |
fdee2e6d MD |
310 | if (err != 0) |
311 | exit(1); | |
83e334d0 | 312 | tot_writes += count_writer[i_thr]; |
fdee2e6d | 313 | } |
83e334d0 | 314 | |
fdee2e6d MD |
315 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
316 | tot_writes); | |
a50a7b43 | 317 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
fdee2e6d MD |
318 | "nr_writers %3u " |
319 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 320 | argv[0], duration, nr_readers, rduration, wduration, |
fdee2e6d MD |
321 | nr_writers, wdelay, tot_reads, tot_writes, |
322 | tot_reads + tot_writes); | |
83e334d0 | 323 | |
bcc74df3 | 324 | free(test_rcu_pointer); |
fdee2e6d MD |
325 | free(tid_reader); |
326 | free(tid_writer); | |
327 | free(count_reader); | |
328 | free(count_writer); | |
83e334d0 | 329 | |
fdee2e6d MD |
330 | return 0; |
331 | } |